Polarized repeating sounder.



A R. SWOBODA.

POLARIZED REPEATING SOUNDER.

APPLICATION FILED SEPT. 13. 1915.

1 ,26 5 ,8 30. Patent-ed. May 14,1918.

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' POLARIZED REPEATING SOUNDER.

APPLICATION FILED SEPT. 13, I915.

Patented May 14,1918.

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UNITED STATES PATENT OFFICE.

ADOLPH R. SWOBODA, 0F MONTCLAIR, NEW JERSEY, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO WESTERN ELECTRIC COMPANY, INCORPORATED, A CORPORATION OF NEW YORK.

POLARIZED REPEATING SOUNDER.

Specification of Letters Patent.

Patented May 14, 1918.

Application filed September 13, 1915. Serial No. 50,376.

To all whom it may concern Be it known that I, ADoLPH RUDOLPH SWOBODA, a citizen of theUnited States, residing at Montclair, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Polarized Repeating Sounders, of which the following is a full, clear, concise, and exact description.

This invention relates to telegraph sounders, and more particularly to a polarized repeating sounder.

The object of this invention is to provide a new and improved form of polarized repeating sounders of few and simple parts readily adjustable and eflicient in operation.

In accordance with one feature of this invention, a simple and eflicient means is provided for ad usting and maintaining the position of a permanent magnet relative to the core of an electromagnet. Preferably this is accomplished by having one end of the permanent magnet pivoted so that the free ends thereof may be swung toward and away from the ends of the cores by adjustable means located at the opposite end of the permanent magnet.

In accordance with another feature of this invention, means are provided for applying contact springs to a sounder of standard construction without modification of the standard construction of the device. Means are also provided for readily adjusting the springs without changing their position with relation to each other. I

This invention is illustrated in the accompanying drawings in which the same refer ence characters are used throughout to desig nate the same parts, and in which Figure 1 is a top view of a polarized repeating sounder embodying this invention. Fig. 2 is a side elevation, partially in section, of the device shown in Fig. 1. Fig. 3 is an end elevation, partially in section, of the device shown in Fig. 1. Fig. 4 shows in detail a contact spring assembly and the method of mounting it. Fig. 5 shows details of the permanent magnet and associated parts.

As shown in the drawings, the polarized repeating sounder comprises a base 6 with an opening 7 therein, over which is mounted a plate 8 which is attached to the base by means of screws 9 (only one screw shown in drawings). On plate 8 is mounted a pair of electromagnets 10, 10. The soft iron cores 11, 11 of the electromagnets have their lower ends reduced in diameter and a shoulder is thereby formed which engages plate 8. In plate 8 holes are drilled through which the reduced ends of the cores pass. The ends of the soft iron cores are drilled and tapped for the reception of screws 12, 12 which form eX- tensions of the cores 11, 11. Screws 12 clamp the plate and cores together.

On plate 8 is also mounted a trunnion bracket 13 which carries a trunnion 14 engaging the sounding bar 15. At the top of trunnion bracket 13 is a fixed plate 17 carrying a lock-nut 18 and adjusting screw 19 which engages one end of sounding bar 15 by means of spring 20 and tends to hold the sounding bar in its normal position. Near the middle of sounding bar 15 is rigidly attached an armature 21 which is attracted by means of the magnetism induced in the cores of the electromagnets. On the sounding bar 15 is mounted a lock-nut 22 and an adjusting screw 23 for limiting the downward stroke of the bar.

All insulating contact pin 24 is carried by arm 25, which is fixed at one end of sound ing bar '15 by means of screws 26, 26. Sounding bridge 27 is attached to and supported by plate 8. On the arm of the sounding bridge is mounted a lock-nut 28 and an adjusting screw 29 for limiting the upward stroke of the sounding bar.

On the sounding bridge 27 is pivotally supported a bifurcated bracket. 30 carrying a contact spring assembly 31 which is rigidly mounted thereon. The master spring of the contact spring assembly engages the insulating contact pin 24 and by movement of the sounding bar 15, which carries said con tact pin, make-and-break connections are made between the master spring and the associated springs. The contact spring assembly mounted on the bifurcated bracket is adjusted by means of spring 32, nut 33 and screw 34 which engages arm 35 of the bifurcated bracket and by turning the nut 33 the contact spring assembly may be separated from or brought in contact with the contact insulating pin 24.

For polarizing the cores of the electro magnets there is mounted on the underneath side of the base 6, aflpelmanent U- shaped magnet SG. The legs of this magnet havebent-over portions 37,37 which are at an angle of approximately 180 de ees with respectto the main portion ofsa1d magnet and rest against a non-magnetic, bar 38, whiohserves as a pivotal pointfor movement of said permanent magnet. The bentover portions 37, 37 lie withmthe o mng 7 of the base 6 with the free ends a jacent the cores of the electromagnet. The nonmagnetic bar 38 lies in groove which runs transversely in plate8,'and in groove 40 which .runs transversely in th'e turnedover portion of said permanent magnet.

The bent-over portions 37, 37 of the magnet- 36 are held against the bar 38 by means of a semi-circular clamping-rod. 4:1 andscrew 42. The threaded portion of screw 42 passes through a hole in the semi-circular clamping-bar between the legs, of the permanent magnet'and engages the metal base 8. By

meansof the longitudinal adjustment of a threaded sleeve 43 engagingscrew 44, both of which are located "at the closed sneer the U-shaped permanent magnet, the 'air' gap between the ends of the cores of theelectro magnet and the freeends of thepermanent magnet is adjusted.

A double-throw switch is represented by 45 and a set of contact terminals by 46,

- both of which are mounted on the base 6.

I It will be noticedthat by mounting the.

contact pin on an extension of the sounder bar and adjustably mounting the contact spring assembly on the sounding brid e,

simpleand reliable means are aii'orded or adjusting the sprin s of a repeating sounder without changing 't eposition of the springs with respect to each other. It will further be noticed that by mounting the permanent magnet with the turned over portions of ts legs lying. in the opening of the base ad acent. the ends of the cores of the electromagnets with one. end of the permanent .magnet pivoted and ad'usting means at the other end, the air gap etween the cores of the .electromagnets and the free ends .ofthe permanent magnet maybe readily adjusted and maintaine What is claimed is: 1.- In a polarized sounder, a base, an eleotromagnet carried by. said base, a perma-.

' tromagnetv mounted thereon,

nent magnet carried by said base and having its free ends adjacent the cores of said electromagnet, and means for adjusting the position of said permanent magnet to vary the air-gap between it and the cores of the electromagnet. 2. In a polarized sounder, a base an eleca l J-shaped permanent magnet mounted on said base with its ends adjacent the ends of the cores of said electromagnet, a pivotal support for said permanent magnet, and means for movmesa-see the ends of the turne over portions adja-' cent the ends of the cores of the electromagnet, a pivotal member against which said ermanent' magnet bears, and means engagmg the closed 'end of said permanent magnet to move it about ltSPIVOlJ tovary the air-gap between the ends of said permanent magnet and the cores of said electromagnet. 4. In a polarized sounder, a base having an opening therethrough, an electromagnet .-'mounted upon one side of said base withits cores adjacent. said opening, a' U-shaped permanent magnet pivotally supported upon the opposite side of said base and havin the ends of its legsturned over and locate in the opening of said base adjacent thecores of the electromagnet, and means for "swinging said permanent pmagnet about its pivotal support, for adjusting the air-gap.

5. In apolarized sounder, an insulating base having an opening 'therethrough, a metal 'base mounted upon said insulating base, nan electromagnet mounted upon its.

metal base with the lower ends of its cores adjacent the opening in said insulating base,

a U-shaped permanent magnet having its legsturned back 'upon themselves, means for.

supporting said permanent magnet from said metal 'base with the turned-over por-' tions within the, opening in said insulating base adjacent the cores of the electromagnet, a pivotal member between said metal base pivotal member. to vary the distance between the ends of said turned-over portion and the cores of said electromagnet.

.6. In a polarized sounder, an insulatingv .base having'an opening therethrough, a

metal base mounted upon said insulating base and provided with a groove extending transversely thereof, an electromagnet and said permanent magnet, and means for swinging said permanent magnet about said mounted upon said metal base with the f lower ends of its cores adjacent the opening in said insulating base, a U-shaped permanent magnet having its le S turned back upon themselves andprovi ed with transs versely extending grooves'in said turned-' over portions, means for supportin said permanent magnet from said meta base with the turned-over portions within the opening in said insulating base adjacent the cores of the electromagnet, a pivotal mem ber lyin in said grooves between said metal base an said permanent magnet, and means for swinging said permanent magnet about said pivotal member to vary the distance between the ends of said turned-over portion and the cores of said electromagnet.

7. In a polarized sounder, an insulating base having an opening therethrough, a metal base mounted upon said insulating base, and provided with a transversely extending groove, an electromagnet mounted upon said metal base with the lower ends of its cores adjacent the opening in said insulating base, a U-shaped permanent magnet having its legs turned back upon themselves and having grooves extending transversely of said turned-over portions, a semi-circular clamping member, means for engaging said semi-circular member for supporting said permanent magnet from said metal base with the turned-over portions within the opening in said insulating base adjacent the cores of the electromagnet, a non-magnetic pivotal pin lying in said grooves between said metal base and said permanent magnet, and means for swinging said permanent magnet about said pivotal pin to vary the distance between the ends of said turnedover portion and the cores of said electromagnet.

. 8. In a repeating sounder, an electromagnet, a sounder bar controlled thereby, a spring contact controlling device carried by said sounder bar, a bridge, and a contact spring assembly adjustably supported on said bridge in operative relation to said spring contact actuating device.

In a repeating sounder, an electromagnet, a sounder bar controlled thereby, a spring contact controlling device carried by said sounder bar, a bridge, a pivotally supported bracket on said bridge, a contact spring assembly carried by said bracket and cooperating with said spring contact controlling member, and adjusting means for said bracket. In witness whereof, I hereunto subscribe my name this 10th day of September, A. D. 1915.

ADOLPH R. SWOBODA. 

